DE592963C - Device on material testing machines for clamping test specimens to be stressed in tension - Google Patents

Device on material testing machines for clamping test specimens to be stressed in tension

Info

Publication number
DE592963C
DE592963C DEL81847D DEL0081847D DE592963C DE 592963 C DE592963 C DE 592963C DE L81847 D DEL81847 D DE L81847D DE L0081847 D DEL0081847 D DE L0081847D DE 592963 C DE592963 C DE 592963C
Authority
DE
Germany
Prior art keywords
tension
stressed
test specimens
material testing
testing machines
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEL81847D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Losenhausenwerk Duesseldorfer Maschinenbau AG
Original Assignee
Losenhausenwerk Duesseldorfer Maschinenbau AG
Publication date
Priority to DEL81847D priority Critical patent/DE592963C/en
Application granted granted Critical
Publication of DE592963C publication Critical patent/DE592963C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0405—Features allowing alignment between specimen and chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0452—Cushioning layer between test piece and grip

Description

Vorrichtung an Materialprüfmaschinen zum Einspannen von auf Zug zu beanspruchenden Probekörpern Die bisher -bekannten Einspannvorrichtungen an Materialprüfmaschinen gewährleisten nicht immer eine gleichmäßige Beanspruchung der Zugprobe. Insbesondere bei Verwendung der bekannten Keilbacken werden vielfach die äußeren Fasern überbeansprucht, während der Kern der Probe geschont bleibt. Dies trifft insbesondere zu bei der Prüfung von Betonbalken. Es ist schon versucht worden, bei letzteren dadurch eine gleichmäßige Beanspruchung der Probe zu erzielen, daß man in den zu prüfenden Betonbalken, über den Querschnitt derselben verteilt, eine große Zahl von Stiftschrauben eingegossen hat, welche sodann durch auf diese aufgeschraubte Muttern in der Einspannvorrichtung befestigt wurden. Hierbei ist es aber außerordentlich schwierig, die zahlreichen Muttern so anzuziehen, daß tatsächlich die Probe gleichmäßig beansprucht wird.Device on material testing machines for clamping on tension stressing test specimens The previously known clamping devices on material testing machines do not always guarantee an even load on the tensile specimen. In particular When using the known wedge jaws, the outer fibers are often overstressed, while the core of the sample is spared. This is especially true with the Testing of concrete beams. Attempts have already been made to do this with the latter to achieve uniform loading of the sample, that one in the concrete beam to be tested, Distributed over the cross section of the same, poured a large number of studs has, which is then screwed onto these nuts in the jig were attached. But it is extremely difficult to find the numerous Tighten the nuts in such a way that the sample is actually evenly loaded.

Die Erfindung beseitigt diese Schwierigkeiten vollständig, und zwar dadurch, daß die Einspannvorrichtung entsprechend der Zahl der zur Verwendung kommenden Stiftschrauben zylinderartige, untereinander in Verbindung stehende Kammern erhält, in welchen die auf die Stiftschrauben aufgeschraubten 'Muttern geführt werden und welche mit kleinen, zur gleichmäßigen Druckverteilung bei Biege- und Druckversuchen bereits bekannten Stahlkugeln angefüllt sind.The invention completely eliminates these difficulties, namely in that the clamping device according to the number of coming to be used Studs receive cylinder-like, interconnected chambers, in which the nuts screwed onto the studs are guided and those with small ones for even pressure distribution during bending and compression tests already known steel balls are filled.

In der Abbildung ist der Erfindungsgegenstand beispielsweise und schematisch dargestellt, und zwar bedeutet Z die Materialprobe (Zugprobe), beispielsweise einen Betonbalken, in welchen in an sich bekannter Weise Stiftschrauben z eingegossen sind. Die Stiftschrauben tragen Muttern 3 von zweckmäßig zylindrischer Gestalt. Mit q. ist die Einspannvorrichtung bezeichnet, welche zylindrische Bohrungen 5 enthält, welche an ihrem unteren Ende sämtlich untereinander in Verbindung stehen. In diesen zylindrischen Bohrungen führen sich die Muttern 3. Der Raum unter den Muttern ist zwecks gleichmäßiger Beanspruchung der Materialprobe mit zu diesem Zweck bereits bekannten kleinen Stahlkugeln ausgefüllt.In the figure, the subject matter of the invention is exemplary and schematic shown, namely Z means the material sample (tensile sample), for example one Concrete beams, in which stud bolts z cast in a known manner are. The studs carry nuts 3 of an expediently cylindrical shape. With q. the clamping device is designated, which contains cylindrical bores 5, all of which are connected to one another at their lower end. In these Cylindrical bores lead the nuts 3. The space under the nuts is for the purpose of uniform loading of the material sample with for this purpose already well-known small steel balls filled in.

Claims (1)

PATENTANSPRUCH: Vorrichtung an Materialprüfmaschinen zum Einspannen von auf Zug zu beanspruchenden Probekörpern mittels an diesen angebrachter Stiftschrauben o. dgl., dadurch gekennzeichnet, daß die Einspannvorrichtung zylinderförmige, untereinander in Verbindung stehende Kammern besitzt, in welchen die auf die Stiftschrauben o. dgl. aufgeschraubten, zweckmäßig zylindrischen Muttern geführt werden und welche mit kleinen zur gleichmäßigen Druckverteilung bei Biege- und Druckversuchen bereits bekannten Stahlkugeln angefüllt sind.PATENT CLAIM: Device on material testing machines for clamping of test specimens to be stressed in tension by means of studs attached to them o. The like., characterized in that the clamping device is cylindrical, one below the other has related chambers in which the o. Like. Screwed, expediently cylindrical nuts and which ones with small ones for even pressure distribution during bending and compression tests known steel balls are filled.
DEL81847D Device on material testing machines for clamping test specimens to be stressed in tension Expired DE592963C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL81847D DE592963C (en) Device on material testing machines for clamping test specimens to be stressed in tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL81847D DE592963C (en) Device on material testing machines for clamping test specimens to be stressed in tension

Publications (1)

Publication Number Publication Date
DE592963C true DE592963C (en) 1934-02-19

Family

ID=7285153

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL81847D Expired DE592963C (en) Device on material testing machines for clamping test specimens to be stressed in tension

Country Status (1)

Country Link
DE (1) DE592963C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036459A (en) * 1961-02-13 1962-05-29 Nylonge Corp Method for testing regenerated cellulose sponge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036459A (en) * 1961-02-13 1962-05-29 Nylonge Corp Method for testing regenerated cellulose sponge

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